It's inconvenient. Multifunctional, but inconvenient. There's no scrolling. I couldn't draw a single map. I guess I'm being subjective, like most people.
Simplicity appeals to you more, as I understand it. I can't compare the Heroes 3 and 4 editors because I haven't played or used the editor for the third game. I started with the fourth game, and the first time I opened it, it seemed difficult to create a map. But time passed, and eventually, I managed to do it.
I couldn't draw a single map.
Multifunctional